化简sin(60°+2x)*cos(60°-2x)
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化简sin(60°+2x)*cos(60°-2x)
化简sin(60°+2x)*cos(60°-2x)
化简sin(60°+2x)*cos(60°-2x)
sin(60°+2x)*cos(60°-2x)
=1/2(sin(60°+2x+60°-2x)+sin(60°+2x-(60°-2x))
=1/2(sin120°+sin4x)
=1/2(√3/2+sin4x)
解:
原式=[√3/2cos(2x)+1/2sin(2x)][1/2cos(2x)+√3/2sin(2x)]
=√3/4cos^2(2x)+sin(2x)*cos(2x)+√3/4sin^2(2x)
=√3/4+1/2sin(4x)
化简:sin(x+60°)+2sin(x-60°)-√3cos(120°-x)=
化简sin(60°+2x)*cos(60°-2x)
化简:sin(x+60°)+2sin(x-60°)-根号下3cos(120°-x)
化简sin(x+60)+2sin(x-60)-( 根号3)cos(120-x)求详解
化简:sin(x+60·)+2sin(x-60·)-√3cos(120·-x)
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